材质
c: 0.0159 si :0.0050 mn:0.0744 p: 0.0075 s:0.0033 cr:0.0347
mo: <0.0050 ni: 0.0171 co : <0.0100 cu : 0.0145 ti :0.0421
v : <0.001 w : <0.0100 ce: <0.0012 fe: 99.76
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